Door and the like checking device.



K. KRAMP.

DOOR AND THE LIKE OHEOKING DEVICE.

APPLICATION FILED FEB.23, 1910.

Patented Sept. 13, 1910.

KARL KRAMP, 0F WUSSEKEN, NEAR BORNTUCHEN, GERMANY.

DOOR AND THE LIKE GHECKING DEVICE.

Specication of Letters Patent.

Patented Sept. 13, 1910.

Application filed February 23, 1910. Serial No. 545,469.

T o all whom 'it may concern:

Be it known that l, KARL KRAMr, a subject of the Emperor of Germany,residing at lVusseken, near Borntuchen, district of Biitow, Pommerania,Germany, have invented certain Improvements in Door and the LikeChecking Devices, of which the following is a specification.

My invention relates to a door and the like checking device which isadapted to be actuated by the air-pressure, incurred by the forcibleclosing of the door, so as to form a resilient abutment for the same,absorbing the shock and deadening the noise.

The invention is illustrated by way of example in the accompanyingdrawing, Figures l and 2 representing side views of the device, partlyin section, in inoperated and operated position respectively, Fig. 3, afront view in cross-section along line A-B of Fig. 1, Fig. 4, across-section along line C-D of Fig. 1, and Fig. 5, a perspective viewof one of the parts.

Two parallel plates a are connected by means of stay-bolts b or the likein any suitable manner. Between said plates a buffer c is slidablyarranged and firmly guided. In the example shown the buffer is providedwith a dovetailed groove (Z and is adapted to slide by means of the sameon a corresponding rib e connected to one of the plates. The buffer 0 ispressed outward by a helical spring f which is guided on a pin L, thelatter' being admitted in an aperture in the buffer. A collar g on thepin can be adjusted for regulating the pressure of the spring. Thebuffer 0 is fitted on one side with a lug n and on the other' side witha stop p, of which the latter limits its outward movement. The plates aare further adapted to receive a V-shaped blade-spring between them. Themembers of said spring are parallel for a distance so as to form aguide-way by lneans of which the spring is slidably mounted on a bolt7c. A lock-spring Z bears with its free end against the lower part ofthe spring z' and presses it against the bolt. One member of the spring'i is weaker than the other and has an abutment in the form of a bolt m,and the other lilcinber rests against a lever o which is pivoted withits lower end to the plates a and which ills up the space between thefront edges of the latter. On the outer end of the lever o an outwardbend is provided. At a slight inward pressure on the levell o the weakmember of the spring z' yields whereby the other member is turned intothe route of the lug n of the butler c so as to be engaged by thelatter.

The device is mounted in the door-casing, preferably near the lock, andis arranged so that the buffer c is depressed by the door when thelatter is closed.

At a slow closing of the door the buffer is easily depressed against theopposition of the spring f. Should the door be forcibly closed, however,the draft created thereby will actuate the lever 0 so that the spring z'is turned, in the above described manner into the route of the lug a.lhen the door depresses the butl'er c, therefore, the latter is checkedby the spring z' which is pressed down on the bolt le against theopposition of the spring Z. The shock is absorbed by the springs and nonoise is produced.

The recess for the door in the door-casing may in addition be lined witha strip of felt, rubber, or the like, having the same color as thecasing. The buffer c is preferably provided with a rubber front.

The mechanism may also be arranged in the lock and the construction ofthe parts may be varied without departing from the spirit of theinvention.

I claim l. A device for checking doors and the like, comprising a bufferslidably arranged in the door-casing, a spring normally out ofengagement with said butler, and a lever adapted, when the door isforcibly closed, to be actuated by the draft created by such closing soas to turn the spring into engagement with the buffer, the latter' thenforming a resilient abutment for the door, substantially as and for thepurpose set forth.

2. A device for checking doors and the like, comprising a bufferslidably guided between two platcs mounted in the door-casing, a helicalspring tending to hold the butl'er in projecting position so as to bedepressed by the door when closed, a lug on the lower side of thebutler, a lever pivoted between the front edges of the plates andadapted to be pressed inward by the draft created when the door isforcibly closed, a V-shaped spring slidably guided on a transverse boltand pressed against the same by a lock-spring, one member of the V-abutment for the door,substantia11y as and shaped spring being Weak andbearing for the purpose set forth.

aoanst a stay-bolt the other member bearilg against Said lefer so as tobe turned by KARL KRAMP' the saune, When the latter is actuated by thedraft, into engagement With the lug on the buffer, vthe latter thenforming a resilient i Witnesses:

ERNST FEMENSKI, ELISE FRIESE.

